Nuclear power plant shutdown in December caused by human operation error Fri 12th February 2021 | 07:20 PM HELSINKI, (UrduPoint / Pakistan Point News - 12th Feb, 2021 ) :An automatic emergency shutdown of the Olkiluoto nuclear power plant in southwestern Finland on Dec. 10 was caused by a human operation error, not any technological fault or equipment breakdown, the Finnish Radiation and Nuclear Safety Authority (STUK) reported on Friday. This was the first emergency shutdown of a nuclear plant in Finland, since the start of using nuclear energy in the national power grid in the mid-1970s. STUK explained that during maintenance a pump had been stopped, and when it was restarted improperly water had started going in the wrong direction, causing erroneous entry of hot water to the reactor cooling system.